Thread: Fast clrscr function

Unregistered:
This are my words too: "I want that printf will be used only once and that the program will clear the selected rows and cells in one shot." - you see SELECTED rows and cells.

I think you should read the thread more carefully.

shaik786:
Your code is for DOS. C'mon people, READ MY INSTRUCTIONS!!!!!!!!!!!!

I'm programming in VC++.NET (win32 console program) and VC++.NET does not support direct access to the video memory.

here you have to pass the size & position of your block which you want to be cleared...

this is what you want!

/*

here
sr = starting row
er = ending row
sc = starting coloumn
ec = ending coloumn

*/

#include<stdio.h>
#include<conio.h>
#include<dos.h>

void cls(void);

int main()
{

gotoxy(5,5);

printf("please write anything on the screen anywhere & pass parameter to this function cls() according to your need!");

getch(5,5,7,7,10);
cls();
printf("you're done!");

getch();
return 0;
}

void cls()
{
union REGS i,o;

i.h.ah = 6;
i.h.bh = attb;
i.h.ch = sr;
i.h.dh = er;
i.h.al = 0;
i.h.cl = sc;
i.h.dl = ec;

int86(16,&i,&o);
gotoxy(1,1);

//gotoxy(sr,sc);

}

sorry there was an error!


#include<stdio.h>
#include<conio.h>
#include<dos.h>

void cls(void);

int main()
{

gotoxy(5,5);
printf("please write anything on the screen anywhere & pass parameter to this function cls() according to your need!");
getch(5,5,7,7,10);
cls();
printf("you're done!");

getch();
return 0;
}

void cls(int sr,int sc,int er,int ec,int attb)
{
union REGS i,o;

i.h.ah = 6;
i.h.bh = attb;
i.h.ch = sr;
i.h.dh = er;
i.h.al = 0;
i.h.cl = sc;
i.h.dl = ec;

int86(16,&i,&o);
gotoxy(1,1);
}

s_ruchit:
You are not helping me. I don't understand you. I wrote that your code is for DOS. READ the whole thread.

Here are a couple of functions I constructed for a small user interface within a program. The functions make full use of the <conio.h> library and was compiled on borlands tcwin4.5C++.

This function set up the user screen display...which was then filled with an appropriate message

Code:

void user_grid (void)
{
  int i;
  /* the user grid */
  clrscr();
  for(i = 0; i < 77; i++)
  {
           gotoxy(2 + i, 2);putchar('*');
           gotoxy(2 + i, 5);putchar('*');
           gotoxy(2 + i, 24);putchar('*');
  }
  for(i = 0; i < 21; i++)
  {
           gotoxy(2, 3 + i);putchar('*');
           gotoxy(78, 3 + i);putchar('*');
  }
}   /* end user_grid function */

during the process of the program user messages were printed to the center of the grid. Each set of messages were cleared from the center grid by the following function..

Code:

void clrgrid (void)
{
   int i;
   /* Clear previous user messages */
   for(i = 0; i < 16; i++)
  {
	gotoxy(3, 7 + i);
	printf("%75c", ' ');
   }
} /* end clrgrid function */

you could attempt this program to see it work

Code:

int main (void)
{
	int i = 0;

	user_grid();
	for(i = 0; i < 10; i++)
	{
		gotoxy(8, 8 + i);
		printf("FIRST USER MESSAGES");
	}
	gotoxy(10, 20);puts("Hit return to continue :");
	gotoxy(34, 20);getch();
	clrgrid();
	for(i = 0; i < 10; i++)
	{
		gotoxy(8, 8 + i);
		printf("SECOND USER MESSAGES");
	}

	return 0;
}

Sean and bigtamscot:

You're not helping me. BEFORE YOU POST ANYTHING, PLEASE, READ THE THREAD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!